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Abstract MSRox is a wheeled mobile robot with two actuated degrees of freedom that has smooth motion on flat surfaces, and has the capability of climbing stairs and traversing obstacles and flexibility toward uphill, downhill and slope surfaces. MSRox with 82.916 cm in length, 54.10 cm in width and 29.249 cm in height has been designed to climb stairs with 10 cm in height and 15 cm in width; nevertheless, it has the capability of climbing stairs up to about 17 cm in height and unlimited width. In this paper, the motion systems and the capabilities of MSRox are described. Furthermore, experimental results of stair climbing and comparison of the results with others are presented.

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Rehabilitation is a process in which the patient achieves his/her lost ability and individual independence in performing their daily activities using numerous facilities and equipment. About 30% of human life-threatening injuries are related to their hand. The human hand, as one of the most important organs of the human body in interacting with the environment, has the greatest role in maintaining individual independence in daily work. In this article, a rehabilitation system has been designed for hand tendon injury using observations of traditional rehabilitation of hand injuries after surgery and recovery period, and through a mechanism based on structures restricting undesirable degrees of freedom. The mechanism used in this design has been selected by considering conventional tendon injury rehabilitation exercises. In this way, the system can easily bend the finger over the marked joint by using a tendon shape mechanism, which applies force on the tip of the finger. The process of system designing is completed using a prototype to examine the method of operation as well as to obtain the required forces for choosing electrical elements.

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Hands are complex moveable organs of the human body. some reasons such as stroke can cause the hands disordering. These patients have problem doing their daily routines. Communication between human and robots lead to inventing devices to improving ability. This paper aims to design and prototype a portable wearable robot. This robot has been designed to facilitate the daily routines of patients who are not able to extend their hands. Researchers are facing challenges like high cost due to numerous actuators and innumerous sensors used to control the system. As the number of elements used to build the device increase, the ultimate weight of the device, also, grows, and practically it loses portability. According to the importance of portability of the robot and the need for long-term use by the user, device components with less weight are designed in this work. In this regard, in the introduced mechanism, a torque is applied to the lowest metacarpophalangeal joints simultaneously by only one electric operator; therefore, fingers are opened. The power transmission system is inspired from the hand tendon with the help of the cable length changes. Because of disturbances and nonlinearity of the system, sliding mode controller to minimize the error is designed. The results demonstrate that the joint angle converges to the desired angle, and the error tends to zero. Good results of the practical test, in addition to being low cost, and weight imply that we can trust the extensibility of this project.